Sanitary appliance for telephones.



G. T. HADLEY.

SANITARY APPLIANCE FOR TELEPHONES. APPLICATION FILED JAN.10,1910.

983,491. Patented Feb. 7, 1911.

GEORGE '1. HADLEY, OF SAN FRANCISCO, CALIFORNIA.

SANITARY APPLIANCE FOR TELEPHONES.

Specification of Letters Patent.

Patented Feb. 7, 1911.

Application filed January 10, 1910. Serial No. 537,229.

To alt "whom it may concern:

Be it known that I, GEORGE T. HADLEY, a citizen of the United States,residing at San Francisco, in the county of San Francisco and State ofCalifornia, have invented new and useful Improvements in SanitaryAppliances for Telephones, of which the following is a specification.

My invention relates to the class of sanitary appliances for telephones,its object being to protect the speaker from possible infection throughany unsanitary condition of the mouth-piece or speaking parts thereof,without diminishing the effect of sound on r the transmitter.

The device is of hollow globular form, and can be made of any thin metalor other material, but preferably of aluminum of about of an inch inthickness, and perforated in any design pleasing to the eye, with holesto l; inch in diameter. A liquid disinfectant may from time to time bedropped into the globe through the perforations, thereby keeping theappliance in a sanitary condition. made either with or withoutperforations, depending upon the material of which it is manufacturedand the thickness thereof. It is made attachable to the mouth-pieceofthe telephone with the metallic fastener hereinafter specified, or tothe transmitter by any means suitable for the purpose.

In the accompanying drawing, Figure 1 is a side view of my device inposition on the mouthpiece of a telephone transmitter; Fig. 2 is asectional view of the device, the transmitter being omitted; Fig. 3 is arear view of the device, detached; Fig. 4 is a plan view of the fastenerblank; Fig. 5 is a perspective viewof the fastener ready for use; Fig. 6is a broken side view of a modilied form of the device.

Referring to the drawing, 1 indicates a telephone transmitter ofordinary design, having a mouth piece 2.

3 indicates a sanitary resonator, which is globular in shape and isformed of thin resilient metal or other material. It has a round opening9, shown in Fig. 8, of size slightly smaller than the end of the mouthpiece. In order to apply it to the mouthpiece, it is compressed so thatthe opening 9 assumes an elliptical or elongated form, and, while inthis form, the flaring rim of the mouth-piece is passed obliquelythrough said openin The resonator is attached to The device may be saidmouthpiece by the fastener 5, which comprises a ring of sheet metalhaving radial outwardly extending tips or fingers 6, which are bent backupon themselves, as shown in Fig. 5. Said ring is first inserted in themouth-piece, the fingers or tips 6 extending over and outside the edgeof the mouth-piece. The resonator in the manner above explained is thenpassed over the edge of the mouth-piece and ring and said fingers arethen bent again back over the edge of said resonator. This fastenerbeing made of thin brass or other malleable metal may be removed andreplaced a number of times without becoming unfit for use. The resonator3 is either perforated, as shown at a in Figs. 1, 2 and 3, or isunperforated as shown in Fig. 6. This fastener may either be fastened tothe mouth-piece as shown, or the mouth-piece can be removed and theresonator fastened direct to the transmitter. Being in form almost aperfect sphere with only a sufficient portion removed to allow ofconnection to the telephone mouth-piece or transmitter it presents tothe speaker a convex surface regardless of the direction at which thevoice may be directed toward it, and all air currents impinging upon itproduced by the speaker in the act of speaking are deflected away fromthe speaker, thereby rendering the return of any germ or microbe-ladenair toward the speaker impossible. This, together with the facility withwhich it may be applied and kept in a sanitary condition, makes it botheffective and practical. At the same time the sound vibrations are, bythe interior surface 8 of the resonator, conveyed to the transmitterundiminished in amplitude.

I claim 1. In combination with a telephone transmitter, a hollowglobular resonator of more than a hemisphere in form having a pluralityof perforations, and operatively connected to the transmitter to permitsound waves from within the resonator to be received by the diaphragm ofthe transmitter, substantially as described.

2. In combination will a telephone transmitter, a hollow globularresonator of more than a hemisphere in form having its surface aperturedand operatively connected to the transmitter through said aperture topermit sound waves from within the resonator to be received by thediaphragm of the transmitter, substantially asdescribed.

3. In combination with a telephone mouth-piece, a hollow globularresonator, of resilient material, and of more than a hemisphere in form,having an opening smaller than the outer end of the mouth- "piece, butsufliciently large that when deformed by pressure 011 the resonator,said end can be passed therewithin, substantially as described.

4. In combination with a telephone mouth-piece and a sanitary device, afastener for securing said device to said mouthpiece, consisting of aplurality of double bends of flexible material joined together in acircle by a bevel ring of the same ma- GEORGE T. HADLEY.

Vitnesses THOMAS Trrrn'r'r, W'. B. BUSH.

